However, the internet is a wonderful place and someone on Ravelry pointed me at a particular blog post where a fellow 'ex-pat-in-Switzerland' had the same difficulty. She solved it very simply- she bought some from her local baker. In the UK this might be quite difficult, as there are not many local bakers left. Happily, that is not the case here. The next village along has a bakery with shop right on the main street. In fact, you can watch the bakers at work as you go past. I dropped in today and they were most helpful. They didn't have any on the premises but are going to order some for me. Result :0)
ETA: I Had a phone call from the baker. He was speaking Swiss German, I was (wo)manfully plodding on with German. I think it is now on order. All 12kg of it. Yep, they can't get a smaller pack.